Electronics and Communication Engineering - Networks Analysis and Synthesis

36.
When cells having different emfs are connected in parallel, a circulating current flows.
True
False
Answer: Option
Explanation:

To avoid circulating current cells in parallel should be identical.


37.
In a specimen of cast iron, a field strength of 400 AT/m cause a flux density of 0.6 T. In a specimen of silicon steel, the same value of H would cause B to be
0.6 T
more than 0.6 T
less than 0.6 T
0.6 T or less than 0.6 T
Answer: Option
Explanation:

Since μr for silicon steel is more than that of cast iron, flux density will be more than 0.6 T.


38.
The circuit shown in figure, will act as an ideal current source with respect to terminals A and B, when frequency is
zero
1 rad/s
4 rad/s
16 rad/s
Answer: Option
Explanation:

to find the frequency. Put XC + XL = 0.


39.
The realization of a term in the impedance function will give
an inductance of value K0 in series
an inductance of value 1/K0 in series
even to odd or odd to even polynomials
even to even polynomials
Answer: Option
Explanation:

Impedance of capacitance


40.
An RL admittance function can also be realized as
RC admittance function
RC impedance function
LC admittance function
LC impedance function
Answer: Option
Explanation:

RL admittance function and RC impedance function have similar forms.